Thermal insulation putty powder and production process thereof

Abstract

The present application relates to the field of powder production process, especially to a kind of heat insulation putty powder and its production process, the putty powder is composed of the following weight fraction raw materials: 30~40 parts talcum powder, 30~40 parts refractory aggregate, 30~40 parts water and 1~15 parts binder, wherein, refractory aggregate needs to be pretreated before mixing, the pretreatment process is as follows: refractory aggregate is dehydrated by vacuum low temperature, so that the water content of refractory aggregate is reduced to less than 0.5%, the water adsorbed in the interior and surface of refractory aggregate is removed by vacuum low temperature dehydration process, the free water film on the surface of aggregate and the bound water in capillary hole are reduced, in the subsequent mixing process, dry and porous refractory aggregate has stronger liquid affinity due to the increase of surface energy, can quickly adsorb and penetrate the slurry mixture composed of water and binder around, when the mixture is applied to wall, the adhesion of refractory aggregate can be effectively improved.

Description

Technical Field

[0001] This invention relates to the field of powder production technology, specifically to a heat-insulating putty powder and its production process. Background Technology

[0002] Traditional interior wall putty powder is often made of inorganic gel material as base material, combined with binder and other additives. It not only cannot play a role in heat insulation, but also causes cracking and hollowing due to the temperature of the insulation layer. At the same time, the whiteness and texture of existing interior wall putty powder need to be improved.

[0003] In current putty powder production, granular aggregates are often mixed in when producing putty powder with specific insulation and heat-insulating effects. The lightweight and fine density of the refractory aggregates are used to improve insulation performance. However, after adding this material to the putty powder raw materials and mixing, the granular aggregates are lighter than the insulation foaming agent and the putty powder raw materials. During mixing, the refractory aggregates are difficult to evenly mix into the putty powder mixture. They tend to accumulate on the top layer of the putty powder mixture. As a result, during the subsequent putty powder application process, it is impossible to ensure that the unevenly mixed refractory aggregates can evenly apply their insulation effect to the entire wall. Furthermore, the clumps of refractory aggregates in the mixture cannot evenly cover the surface of the mixture, making it difficult to form effective adhesion in subsequent operations. Summary of the Invention

[0004] This invention provides a heat-insulating putty powder and its production process, which overcomes the shortcomings described in the background art.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A heat-insulating putty powder, wherein the putty powder is composed of the following raw materials in parts by weight:

[0007] 30-40 parts talc powder, 30-40 parts refractory aggregate, 30-40 parts water, and 1-15 parts binder;

[0008] The refractory aggregates need to be pretreated before mixing. The pretreatment process is as follows:

[0009] The refractory aggregate is dehydrated under vacuum at low temperature, reducing the moisture content of the refractory aggregate to less than 0.5%.

[0010] A preferred technical solution is that, when the refractory aggregate undergoes vacuum low-temperature dehydration, the vacuum environment temperature is below 40°C and the vacuum degree of the vacuum environment is greater than 0.095 MPa.

[0011] The refractory aggregate is one or more of aluminum hydroxide, magnesium hydroxide, hollow glass microspheres, chopped aluminum silicate fiber powder, mica powder, and zinc vitrified borate.

[0012] The binder is one or more of the following: water glass, silica sol, aluminum sol, silica sol, aluminum sulfate, aluminum dihydrogen phosphate, sodium hexametaphosphate, sodium tripolyphosphate, trisodium phosphate, and sodium pyrophosphate.

[0013] A preferred technical solution further includes 1-5 parts of suspending agent and 0.01-0.5 parts of defoamer;

[0014] The suspending agent is one or more of the following: attapulgite, bentonite, sepiolite, montmorillonite, Guangxi white clay, and illite clay.

[0015] The defoamer is one or more of phosphate esters, mineral oil defoamers, and organosilicon defoamers.

[0016] A production process for heat-insulating putty powder, based on the aforementioned heat-insulating putty powder, includes a mixing tank and a frame for producing the putty powder. The mixing tank includes a tank body, a sealing cap, a conveying pipe, a second motor, a vibrating spring strip, and a second centrifugal motor. The conveying pipe is disposed inside the tank body, and the sealing cap is disposed on the upper end of the tank body and connected to the upper end of the conveying pipe. The second motors are symmetrically disposed on the left and right sides of the tank body, and the output shafts of both second motors extend into the tank body. A stirring rod is installed on the output shafts of both second motors. The vibrating spring strip is connected to the back of the second centrifugal motor, which is connected to the side of the tank body. The lower end of the conveying pipe extends to a position close to the vibrating spring strip.

[0017] The delivery pipe includes a vent extending outside the tank body;

[0018] The production process is as follows:

[0019] Talc powder, water, and binder are poured into the tank and stirred by the stirring rod installed on the output shaft of the second motor. During the stirring process, refractory aggregate is added into the pouring port and discharged into the tank through the conveying pipe. While the stirring rod is mixing the materials, the centrifugal motor vibrates to eliminate air bubbles between the materials and break up the refractory aggregate that is clumped around the vibrating spring strip, so that the refractory aggregate is evenly mixed in the mixture.

[0020] A preferred technical solution is that the conveying pipe includes a servo motor fixed on the sealing cover, a conveying pipe body, an overflow pipe and a roller body, the inlet is connected to the side of the conveying pipe body, the output shaft of the servo motor is provided with the roller body, the conveying pipe body is sleeved on the outside of the roller body, and the overflow pipe is connected to the left and right sides of the conveying pipe body respectively.

[0021] In a preferred embodiment, the overflow pipe is inclined downwards, and the overflow pipe has a sloping protrusion inside, which forms an angle with the inner side of the conveying pipe body;

[0022] The horizontal plane of the end of the overflow pipe away from the conveying pipe is lower than the horizontal plane of the end of the inclined protrusion near the conveying pipe.

[0023] In a preferred embodiment, the vibrating spring strip extends in an S-shape and is staggered from the two stirring rods, and the end of the vibrating spring strip away from the centrifugal motor is connected to the inside of the tank via a connecting spring.

[0024] The outer diameter of the connecting spring gradually increases from the edge to the center.

[0025] In a preferred embodiment, the tank body is provided with an installation opening near the centrifugal motor 2. The centrifugal motor 2 is embedded in the installation opening through a connecting protrusion provided on its side. There is a gap between the connecting protrusion and the installation opening. The gap is filled with an air bladder. The surface of the installation opening away from the centrifugal motor 2 is covered with a sealing rubber coating. The vibration spring strip passes through the sealing rubber coating and is connected to the centrifugal motor 2.

[0026] Compared with existing technologies, this technical solution has the following advantages:

[0027] After removing the adsorbed moisture from the interior and surface of the refractory aggregate through a vacuum low-temperature dehydration process, reducing its moisture content to below 0.5%, this treatment significantly reduces the free water film on the aggregate surface and the bound water in the capillaries, exposing the microporous structure of the refractory aggregate surface. During subsequent mixing, the dry and porous refractory aggregate exhibits stronger hydrophilicity due to its increased surface energy, enabling it to rapidly absorb and penetrate the surrounding slurry mixture composed of water and binder. When the mixture is applied to the wall, this effectively improves the adhesion of the refractory aggregate.

[0028] In this invention, a bidirectional shear flow field can be formed by the symmetrically arranged motor II and its stirring rollers. While talc powder, water and binder are initially mixed, strong shear force is provided to break up any agglomerates that may be formed, thus creating a good base slurry environment for the uniform embedding of aggregates in the subsequent process.

[0029] Secondly, the centrifugal motor drives the vibration spring strip to generate high-frequency radial vibration, which applies strong vibration at the moment the refractory aggregate is discharged from the conveyor pipe, and immediately breaks up the refractory aggregate clumps that have gathered at the outlet. Attached Figure Description

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Figure 1 This is an overall diagram of the present invention.

[0032] Figure 2 This is a schematic diagram of a mixing tank.

[0033] Figure 3 This is a schematic diagram of the transmission tube.

[0034] Figure 4 This is a three-dimensional schematic diagram of the transmission tube.

[0035] Figure 5 for Figure 4 Half-section diagram.

[0036] Figure 6 This is a schematic diagram of the overflow pipe.

[0037] Figure 7 This is a three-dimensional schematic diagram of a vibration spring bar.

[0038] Figure 8 This is a schematic diagram of centrifugal motor II.

[0039] Figure 9 This is a schematic diagram of the airbag and sealing rubber coating structure.

[0040] Figure 10 This is a schematic diagram of the installation opening.

[0041] In the diagram: Mixing tank 1, frame 2;

[0042] 11. Tank body; 12. Sealing cover; 13. Conveying pipe; 14. Motor II; 15. Vibration spring strip; 16. Centrifugal motor II;

[0043] Installation opening 111;

[0044] Servo motor 131, conveyor pipe body 132, overflow pipe 133, inclined protrusion 1331, inverted opening 134, roller body 135;

[0045] Stirring rod 141;

[0046] Connecting spring 151;

[0047] Connecting protrusion 161, airbag 162, and sealing rubber coating 163. Detailed Implementation

[0048] like Figures 1 to 10 As shown, this invention proposes a heat-insulating putty powder, which is composed of the following raw materials in parts by weight:

[0049] 30-40 parts talc powder, 30-40 parts refractory aggregate, 30-40 parts water, and 1-15 parts binder;

[0050] The refractory aggregates need to be pretreated before mixing. The pretreatment process is as follows:

[0051] The refractory aggregate is dehydrated under vacuum at low temperature, reducing the moisture content of the refractory aggregate to less than 0.5%.

[0052] It should be explained that after removing the adsorbed moisture from the interior and surface of the refractory aggregate through a vacuum low-temperature dehydration process, reducing its moisture content to below 0.5%, this treatment significantly reduces the free water film on the aggregate surface and the bound water in the capillaries, exposing the microporous structure of the refractory aggregate surface. During subsequent mixing, the dry and porous refractory aggregate, due to its increased surface energy, exhibits stronger hydrophilicity, enabling it to rapidly absorb and penetrate the surrounding slurry mixture composed of water and binder. When the mixture is applied to the wall, this effectively improves the adhesion of the refractory aggregate.

[0053] Among them, when refractory aggregates are subjected to vacuum low-temperature dehydration, the vacuum environment temperature is below 40°C and the vacuum degree of the vacuum environment is greater than 0.095 MPa.

[0054] The aforementioned "vacuum" refers to placing the material in a sealed container and using a vacuum pump to evacuate the air, making the pressure inside the system significantly lower than atmospheric pressure (e.g., in this invention, the vacuum degree is greater than 0.095 MPa, i.e., the absolute pressure is less than 5 kPa). Under low-pressure conditions, the boiling point of water decreases significantly (for example, at a vacuum degree of 0.095 MPa, the boiling point of water can drop to below approximately 30°C), allowing water to vaporize and escape at low temperatures.

[0055] In this invention, the process is used to treat refractory aggregates (such as hollow glass microspheres, aluminum hydroxide, etc.). Since these materials are mostly lightweight, porous, or contain crystalline water / surface hydroxyl groups, conventional high-temperature drying can easily lead to microsphere rupture, premature decomposition of hydroxides, or surface sintering, affecting their thermal insulation and flame-retardant functions. However, by using vacuum low-temperature dehydration, the moisture content can be efficiently reduced to below 0.5% without damaging the material's physicochemical structure, thereby:

[0056] Eliminate agglomeration caused by moisture and improve the dispersibility of aggregates in putty slurry;

[0057] Exposing clean, high-energy surfaces enhances interfacial wetting and adhesion with inorganic binders (such as water glass and silica sol);

[0058] To avoid increased bubbles or uncontrolled reaction due to moisture release during subsequent mixing.

[0059] The refractory aggregate is one or more of aluminum hydroxide, magnesium hydroxide, hollow glass microspheres, chopped aluminum silicate fiber powder, mica powder, and zinc vitrified borate.

[0060] The binder is one or more of the following: water glass, silica sol, aluminum sol, silica sol, aluminum sulfate, aluminum dihydrogen phosphate, sodium hexametaphosphate, sodium tripolyphosphate, trisodium phosphate, and sodium pyrophosphate.

[0061] A preferred technical solution further includes 1-5 parts of suspending agent and 0.01-0.5 parts of defoamer;

[0062] The suspending agent is one or more of the following: attapulgite, bentonite, sepiolite, montmorillonite, Guangxi white clay, and illite clay;

[0063] The defoamer is one or more of phosphate esters, mineral oil defoamers, and organosilicon defoamers.

[0064] A production process for heat-insulating putty powder, based on the aforementioned heat-insulating putty powder, includes a mixing tank 1 and a frame 2 for producing the putty powder. The mixing tank 1 includes a tank body 11, a sealing cover 12, a conveying pipe 13, a second motor 14, a vibrating spring strip 15, and a second centrifugal motor 16. The conveying pipe 13 is disposed inside the tank body 11, and the sealing cover 12 is disposed on the upper end of the tank body 11 and connected to the upper end of the conveying pipe 13. The second motor 14 is symmetrically disposed on the left and right sides of the tank body 11, and the output shafts of both second motors 14 extend into the tank body 11. A stirring rod 141 is installed on the output shafts of both second motors 14. The vibrating spring strip 15 is connected to the back of the second centrifugal motor 16, and the second centrifugal motor 16 is connected to the side of the tank body 11. The lower end of the conveying pipe 13 extends to a position close to the vibrating spring strip 15.

[0065] The conveying pipe 13 includes a vent 134 extending outside the tank body 11;

[0066] The production process is as follows:

[0067] Talc powder, water, and binder are poured into tank 11 and stirred by stirring roller 141 mounted on the output shaft of motor 2 14. During the stirring process, refractory aggregate is added into pouring port 134 and discharged into tank 11 through conveying pipe 13. While stirring roller 141 mixes the materials, centrifugal motor 2 16 vibrates to eliminate air bubbles between the materials and breaks up refractory aggregates clumped around vibrating spring strip 15, so that refractory aggregates are evenly mixed in the mixture.

[0068] This invention effectively solves the defects in the background technology of "lightweight refractory aggregates having low density and easy to float, resulting in uneven mixing, which in turn leads to inconsistent insulation effect and easy cracking and hollowing after construction" by coordinating the internal structure of the mixing tank 1 with the special equipment. Since the conveying pipe 13 and the inlet 134 form a directional feeding channel, the refractory aggregates enter from the outside of the tank 11 through the inlet 134 during the mixing process, and are directly transported to the vibration area near the vibration spring strip 15 in the lower middle part of the tank through the conveying pipe 13, avoiding them from falling freely onto the surface of the slurry and floating and accumulating, thus fundamentally avoiding the stratification problem caused by traditional top feeding.

[0069] Secondly, the symmetrically arranged motor 2 14 and its stirring roller 141 form a bidirectional shear flow field, which provides strong shear force to break up any agglomerates that may be formed while the talc powder, water and binder are initially mixed, thus creating a good base slurry environment for the uniform embedding of aggregates in the subsequent process.

[0070] Secondly, the centrifugal motor 16 drives the vibration spring strip 15 to generate high-frequency radial vibration, which applies strong vibration at the moment of the refractory aggregate discharge conveyor pipe 13, which not only immediately disperses the refractory aggregate clumps gathered at the outlet.

[0071] Finally, the sealing cap 12 and the can body 11 form a closed mixing chamber. With the help of vibration defoaming, the air trapped in the mixing process is effectively removed, reducing the porosity and weak areas at the interface caused by air bubbles, and improving the density and bonding strength of the putty layer.

[0072] Furthermore, the conveying pipe 13 includes a servo motor 131 fixed on the sealing cover 12, a conveying pipe body 132, an overflow pipe 133, and a roller body 135. The inlet 134 is connected to the side of the conveying pipe body 132. The output shaft of the servo motor 131 is connected to the roller body 135. The conveying pipe body 132 is sleeved on the outside of the roller body 135, and the overflow pipe 133 is connected to the left and right sides of the conveying pipe body 132 respectively.

[0073] Furthermore, the overflow pipe 133 is inclined downwards, and the overflow pipe 133 has a sloping protrusion 1331 inside, and there is an angle between 331 and the inner side of the conveying pipe body 132; the horizontal height of the end of the overflow pipe 133 away from the conveying pipe body 132 is lower than the horizontal height of the end of the sloping protrusion 1331 close to the conveying pipe body 132.

[0074] As can be seen above, after the refractory aggregate is fed through the inlet 134, the aggregate falls downward along the inner wall of the conveying pipe 132 under the action of gravity. During this process, the aggregate will not leak out from the overflow pipe 133, mainly due to the special structural design of the inclined protrusion 1331: the overflow pipe 133 is arranged at an angle downward, and the inclined protrusion 1331 inside it forms an acute angle with the inner side of the conveying pipe 132 towards the center of the pipe body, and the horizontal height of the end of the overflow pipe 133 away from the conveying pipe 132 is lower than the horizontal height of the end of the inclined protrusion 1331 near the conveying pipe 132. This structure makes the inclined protrusion 1331 essentially a "material retainer" with a higher inner surface and a lower outer surface. When aggregate particles fall to the inlet of the overflow pipe 133, they cannot cross this retainer and enter the overflow channel because their particle size is larger than the included angle or because they are blocked by the inclined protrusion 1331. Meanwhile, gas or trace amounts of slurry can be discharged along the inclined channel by their fluidity, achieving pressure balance. Thus, while ensuring stable pressure inside the tank, it effectively prevents solid aggregate from leaking from the overflow pipe 133.

[0075] Furthermore, the vibration spring strip 15 extends in an S-shape and is staggered from the two stirring rods 141, and the end of the vibration spring strip 15 away from the centrifugal motor 16 is connected to the inside of the tank 11 through a connecting spring 151.

[0076] The outer diameter of the connecting spring 151 gradually increases from the edge to the center.

[0077] Furthermore, the tank body 11 has an installation opening 111 near the centrifugal motor 16. The centrifugal motor 16 is embedded in the installation opening 111 through a connecting protrusion 161 on its side. There is a gap between the connecting protrusion 161 and the installation opening 111, and an airbag 162 is filled in the gap. The surface of the installation opening 111 away from the centrifugal motor 16 is covered with a sealing rubber coating 163, and the vibration spring strip 15 passes through the sealing rubber coating 163 and is connected to the centrifugal motor 16.

[0078] This invention effectively ensures the airtightness of the vibrating spring strip 15 under high-frequency vibration conditions and achieves reliable filling and sealing of the installation area through the following structural design: First, a sealing rubber coating 163 covers the surface of the installation opening 111 away from the centrifugal motor 16, and the vibrating spring strip 15 passes through this coating and connects to the centrifugal motor 16. When the vibrating spring strip 15 passes through, the rubber coating 163 tightly covers its surface, forming a dynamic sealing interface while allowing the spring strip to vibrate. This effectively prevents the slurry, water vapor, or dust inside the tank 11 from escaping from the installation opening 111, thereby ensuring a completely sealed mixing process and avoiding environmental pollution and material loss.

[0079] The above description is merely a preferred embodiment of the present invention, and therefore should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of the patent and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A process for the production of an insulating putty powder, characterized in that, The application relates to a production device for heat-insulating putty powder, which comprises a mixing tank and a frame body, the mixing tank comprises a tank body, a sealing cover, a conveying pipe, two motors, a vibrating spring strip and a centrifugal motor, the conveying pipe is arranged in the tank body, the sealing cover is arranged on the upper end of the tank body and is connected with the upper end of the conveying pipe, the two motors are symmetrically arranged on the left and right sides of the tank body, the output shafts of the two motors are extended into the tank body, stirring rods are arranged on the output shafts of the two motors, the vibrating spring strip is connected with the back of the centrifugal motor, the centrifugal motor is connected to the side of the tank body, and the lower end of the conveying pipe is extended to the position close to the vibrating spring strip. The conveying pipe comprises a pouring opening extending to the outside of the tank body. The heat-insulating putty powder is composed of the following raw materials in parts by weight: 30-40 parts of talcum powder, 30-40 parts of refractory aggregate, 30-40 parts of water and 1-15 parts of binder. The refractory aggregate needs to be pretreated before mixing, and the pretreatment process is as follows: The refractory aggregate is subjected to vacuum low-temperature dehydration so that the water content of the refractory aggregate is reduced to less than 0.5%. The vacuum environment temperature is lower than 40 DEG C, and the vacuum degree of the vacuum environment is greater than 0.095 Mpa. The refractory aggregate is one or more of aluminum hydroxide, magnesium hydroxide, hollow glass microbeads, short-cut aluminum silicate fiber powder, mica powder and vitrified zinc borate. The binder is one or more of water glass, silica sol, aluminum sol, silicic acid sol, aluminum sulfate, aluminum dihydrogen phosphate, sodium hexametaphosphate, sodium tripolyphosphate, trisodium phosphate and sodium pyrophosphate. 1-5 parts of suspending agent and 0.01-0.5 parts of defoaming agent are further included. The suspending agent is one or more of attapulgite, bentonite, sepiolite, montmorillonite, Guangxi white mud and illite clay. The defoaming agent is one or more of phosphate ester, mineral oil defoaming agent and organic silicon defoaming agent. The production process is as follows: The talcum powder, water and binder are poured into the tank body, the stirring rods arranged on the output shafts of the two motors are used for stirring, the refractory aggregate is added into the pouring opening during the stirring process, the refractory aggregate is discharged into the tank body through the conveying pipe, the bubbles among the mixed materials are eliminated through the centrifugal motor, the refractory aggregate gathered around the vibrating spring strip is dispersed, and the refractory aggregate is uniformly mixed into the mixed materials.

2. A process for producing an insulating putty powder according to claim 1, characterized in that, The conveying pipe comprises a servo motor fixed on the sealing cover, a conveying pipe body, an overflow pipe and a roller body, the pouring opening is connected to the side of the conveying pipe body, the output shaft of the servo motor is provided with the roller body, the conveying pipe body is sleeved outside the roller body, and the overflow pipes are respectively connected to the left and right sides of the conveying pipe body.

3. A process for producing an insulating putty powder according to claim 2, characterized in that, The overflow pipe is arranged in an inclined downward mode, and the overflow pipe is provided with an inclined convex portion, and an included angle exists between the inner side of the conveying pipe body and the inclined convex portion. The horizontal plane height of the end of the overflow pipe away from the conveying pipe body is lower than the horizontal plane height of the end of the inclined convex portion close to the conveying pipe body.

4. A process for producing a thermal insulating putty powder according to claim 3, characterized in that, The vibrating spring strip extends in an S shape and is staggered with the two stirring rods, and the end of the vibrating spring strip away from the centrifugal motor is connected with the inner side of the tank body through a connecting spring. The outer diameter of the connecting spring gradually increases from the edge to the middle.

5. A process for producing an insulating putty powder according to claim 4, characterized in that, The can body is provided with mounting openings near the two centrifugal motors, the connecting protrusions provided on the side surface of the second centrifugal motor are embedded in the mounting openings, there is a gap between the connecting protrusions and the mounting openings, the gap is filled with air bags, the surface away from the second centrifugal motor of the mounting opening is covered with a sealing rubber coating, and the vibration spring strip is connected with the second centrifugal motor after penetrating through the sealing rubber coating.

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